Unless I am nuts I have an email from Cushcraft a few months back where I
quizzed them about that very thing and am 99% sure they said they were the
same.
Will look back.
Ron
N5QQ
On 12/4/07, K4SAV <RadioIR@charter.net> wrote:
>
> I counted 66 turns on my XM240 coils. Maybe that's the reason I had a
> lot of trouble getting it to go low enough in frequency.
>
> I would expect to see some kind of difference, either element length or
> coil turns, between the XM240 and 40-2CD. That U shaped support channel
> used on the XM240 significantly increases the effective diameter of the
> element, for the length of the channel.
>
> Jerry, K4SAV
>
> Doug Renwick wrote:
>
> >Historically it would be best to replace the self taping SS screw and
> >replace it with a bolt. I drilled the hole through with a 5/32" bit,
> >and used a 6-32 x 1 1/4" SS bolt and filed the bolt flush to the surface
> >of the nut. I put a #6 SS flat washer on the coil and a star washer at
> >the nut.
> >
> >On my XM240 coils I counted 67 turns. Some have reported counting 68
> >turns. Does anyone know if there was a design change or was this a
> >difference between the 40-2CD and XM240?
> >
> >Doug
> >
> >
> >
>
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